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동일한 활동에서 webview 및 listview를 만들려고합니다. 여기 내 레이아웃 파일이다 :동일한 활동의 webview 및 listview
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@android:color/white" >
<com.markupartist.android.widget.ActionBar
android:id="@+id/actionbar"
style="@style/ActionBar" />
<WebView
android:id="@+id/webView1"
android:layout_width="match_parent"
android:layout_height="210dp" />
<ListView
android:id="@+id/listtest"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ListView>
<TextView
android:id="@+id/tv_test2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="10dp"
android:textSize="16sp"/>
여기의 내 행 레이아웃 :
public class Tab_Bike_Information_Activity extends Activity {
WebView mWebView;
TextView tv;
private ListView mainListView;
private ArrayAdapter<String> listAdapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.tessss);
final ActionBar actionBar = (ActionBar) findViewById(R.id.actionbar);
actionBar.setTitle(getString(R.string.app_name));
int index = getIntent().getIntExtra("text", 0);
mWebView = (WebView) findViewById(R.id.webView1);
String temp = "<html><body>" + "<p align=\"justify\">"
+ getString(R.string.xc_info + index) + "</p> "
+ "</body></html>";
mWebView.loadData(temp, "text/html", "utf-8");
mainListView = (ListView) findViewById(android.R.id.list);
// Create and populate a List of planet names.
String[] planets = new String[] { "Mercury", "Venus", "Earth", "Mars",
"Jupiter", "Saturn", "Uranus", "Neptune"};
ArrayList<String> planetList = new ArrayList<String>();
planetList.addAll(Arrays.asList(planets));
// Create ArrayAdapter using the planet list.
listAdapter = new ArrayAdapter<String>(this, R.layout.tessss_row, planetList);
// Add more planets. If you passed a String[] instead of a List<String>
// into the ArrayAdapter constructor, you must not add more items.
// Otherwise an exception will occur.
listAdapter.add("Ceres");
listAdapter.add("Pluto");
listAdapter.add("Haumea");
listAdapter.add("Makemake");
listAdapter.add("Eris");
tv = (TextView) findViewById(R.id.tv_test);
}
과 : 여기
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/white"
android:orientation="vertical" >
<com.markupartist.android.widget.ActionBar
android:id="@+id/actionbar"
style="@style/ActionBar" />
<TextView
android:id="@+id/tv_test"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="10dp"
android:textSize="16sp" >
</TextView>
및 나의 활동입니다 여기 logcat가 :
09-19 20:04:04.659: E/AndroidRuntime(13951): FATAL EXCEPTION: main
09-19 20:04:04.659: E/AndroidRuntime(13951): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.wilis.hellotabwidget/com.wilis.hellotabwidget.Tab_Bike_Information_Activity}: java.lang.NullPointerException
09-19 20:04:04.659: E/AndroidRuntime(13951): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1651)
09-19 20:04:04.659: E/AndroidRuntime(13951): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667)
09-19 20:04:04.659: E/AndroidRuntime(13951): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
09-19 20:04:04.659: E/AndroidRuntime(13951): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
09-19 20:04:04.659: E/AndroidRuntime(13951): at android.os.Handler.dispatchMessage(Handler.java:99)
09-19 20:04:04.659: E/AndroidRuntime(13951): at android.os.Looper.loop(Looper.java:130)
09-19 20:04:04.659: E/AndroidRuntime(13951): at android.app.ActivityThread.main(ActivityThread.java:3687)
09-19 20:04:04.659: E/AndroidRuntime(13951): at java.lang.reflect.Method.invokeNative(Native Method)
09-19 20:04:04.659: E/AndroidRuntime(13951): at java.lang.reflect.Method.invoke(Method.java:507)
09-19 20:04:04.659: E/AndroidRuntime(13951): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
09-19 20:04:04.659: E/AndroidRuntime(13951): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
09-19 20:04:04.659: E/AndroidRuntime(13951): at dalvik.system.NativeStart.main(Native Method)
09-19 20:04:04.659: E/AndroidRuntime(13951): Caused by: java.lang.NullPointerException
09-19 20:04:04.659: E/AndroidRuntime(13951): at com.wilis.hellotabwidget.Tab_Bike_Information_Activity.onCreate(Tab_Bike_Information_Activity.java:75)
09-19 20:04:04.659: E/AndroidRuntime(13951): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
09-19 20:04:04.659: E/AndroidRuntime(13951): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615)
09-19 20:04:04.659: E/AndroidRuntime(13951): ... 11 more
아무도 도와 드릴까요? 감사합니다
줄 75에 NullPointer 예외가 있습니다. 어떤 줄입니까? – Thommy
@Thommy'mainListView.setAdapter (listAdapter);'왜? –
Se 내 대답은 – Thommy